/Engine/Source/Runtime/Engine/Public/Animation/AnimCurveTypes.h
This doesn't blend but combinesMIN(current weight, CurveToCombine weight)
template<typename OtherAllocator, typename OtherElementType> void UseMinValue ( const [TBaseBlendedCurve](API\Runtime\Engine\Animation\TBaseBlendedCurve)< OtherAllocator, OtherElementType > & CurveToCombine )